This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
The following conditions for the connection of power transformers in parallel are required:
It is preferred to connect in parallel transformers having the same characteristics stated below:
Connection in parallel of transformers having a power ratio equal or higher than two is not recommended.
When the transformers do not comply with the above requirements, recommendations for their paralleling shall be asked to the manufacturer
It is preferred to connect in parallel transformers having the same characteristics stated below:
- Voltage ratio
- Rated power
- Short circuit impedance.
- Coupling symbol of windings as for example: Dyn 11
- Impedances of the LV links between the transformers and the main LV switchboard where the paralleling is realized.
Connection in parallel of transformers having a power ratio equal or higher than two is not recommended.
When the transformers do not comply with the above requirements, recommendations for their paralleling shall be asked to the manufacturer
Released for: Schneider Electric Egypt and North East Africa
